Inspired by the contemporary art collection of Peggy Guggenheim, the Colour of Calder collection from < a href=" http://www.selfridges.com/GB/en/cat/astley-clarke/" style="text-decoration: none"><font color="black"><b>Astley Clarke</b></font></a> &nbsp;references everything from the modernist to the surrealist. Designed to appear floating on the finger, this<b> 18ct rose-gold vermeil Yves ring </b>wraps artfully into an open top tipped with two glossy pink opal spheres.